min[1(x)22(x)=1(x) (x1+(1-A)x2)=(Ax+(1-A)x+(1-4)×Q)=(x1+(1-4)×a)a=x2-x1>0 又∵λ∈[0,1 (x1+(1-A)x2)≥(x1) (x1+(1-)x2)≥mn[41(x),2(x) 同理:当x1<x2∈[]时 1(x)>2(x) min[1(x),2(x)]=2(x) (x1+(1-1)x2)=(x2+(1-)x2+xa)=(x2+1×a)2a=x2-x1>0 又∵λ∈[0,1 (x1+(1-A)x2)≥(x2) (x1+(1-A)x2)≥mn[1(x)22(x) (d)、 0.5 0.4min[ ( ), ( )] ( ); 1 2 1  =    x x x 1 2 1 1 1 2 1  + − = + − + −  = + −  = −              ( (1 ) ) ( (1 ) (1 ) ) ( (1 ) ); 0 x x x x x x x 又  [0,1] 1 2 1  + −      ( (1 ) ) ( ) x x x 1 2 1 2  + −       ( (1 ) ) min[ ( ), ( )] x x x x 同理：当 1 2 [ , ]; 4 2 x x     时 1 2   ( ) ( ) x x  min[ ( ), ( )] ( ); 1 2 2    x x x = 1 2 2 2 2 2 1  + − = + − +  = +  = −              ( (1 ) ) ( (1 ) ) ( ); 0 x x x x x x x 又  [0,1] 1 2 2  + −      ( (1 ) ) ( ) x x x 1 2 1 2  + −       ( (1 ) ) min[ ( ), ( )] x x x x (d)、 2 ( )   veryprossmall prossmall = ：